(svn r16597) [0.7] -Backport from trunk:

- Fix: Also catch FPEs in saveload and the warning about missing NewGRFs; only happens when assertions are disabled and NewGRFs are missing (r16572)
- Fix: In some cases, train could be stuck in depot [FS#2974] (r16571)
- Fix: [NoAI] AIMarine::AreWaterTilesConnected did not return true for bridge head<>neighbouring water tile (r16563)
- Fix: Removing of duplicates of base graphics set could behave randomly (r16548)

src/ai/api/ai_marine.cpp

@@ -55,13 +55,13 @@
 	DiagDirection to_other_tile = (TileX(t1) == TileX(t2)) ? DIAGDIR_SE : DIAGDIR_SW;
 
 	/* Determine the reachable tracks from the shared edge */
-	TrackBits gtts2 = ::TrackStatusToTrackBits(::GetTileTrackStatus(t2, TRANSPORT_WATER, 0, to_other_tile)) & ::DiagdirReachesTracks(to_other_tile);
+	TrackBits gtts1 = ::TrackStatusToTrackBits(::GetTileTrackStatus(t1, TRANSPORT_WATER, 0, to_other_tile)) & ::DiagdirReachesTracks(to_other_tile);
-	if (gtts2 == TRACK_BIT_NONE) return false;
+	if (gtts1 == TRACK_BIT_NONE) return false;
 
 	to_other_tile = ReverseDiagDir(to_other_tile);
-	TrackBits gtts1 = ::TrackStatusToTrackBits(::GetTileTrackStatus(t1, TRANSPORT_WATER, 0, to_other_tile)) & ::DiagdirReachesTracks(to_other_tile);
+	TrackBits gtts2 = ::TrackStatusToTrackBits(::GetTileTrackStatus(t2, TRANSPORT_WATER, 0, to_other_tile)) & ::DiagdirReachesTracks(to_other_tile);
 
-	return gtts1 != TRACK_BIT_NONE;
+	return gtts2 != TRACK_BIT_NONE;
 }
 
 /* static */ bool AIMarine::BuildWaterDepot(TileIndex tile, TileIndex front)

src/gfxinit.cpp

@@ -469,8 +469,8 @@ bool OBGFileScanner::AddFile(const char *filename, size_t basepath_length)
 		}
 		if (duplicate != NULL) {
 			/* The more complete graphics set takes precedence over the version number. */
-			if ((duplicate->files == graphics->files && duplicate->version >= graphics->version) ||
+			if ((duplicate->found_grfs == graphics->found_grfs && duplicate->version >= graphics->version) ||
-					duplicate->files > graphics->files) {
+					duplicate->found_grfs > graphics->found_grfs) {
 				DEBUG(grf, 1, "Not adding %s (%i) as base graphics set (duplicate)", graphics->name, graphics->version);
 				delete graphics;
 			} else {

src/saveload/afterload.cpp

@@ -239,6 +239,7 @@ static bool InitializeWindowsAndCaches()
 typedef void (CDECL *SignalHandlerPointer)(int);
 static SignalHandlerPointer _prev_segfault = NULL;
 static SignalHandlerPointer _prev_abort    = NULL;
+static SignalHandlerPointer _prev_fpe      = NULL;
 
 static void CDECL HandleSavegameLoadCrash(int signum);
 
@@ -250,6 +251,7 @@ static void SetSignalHandlers()
 {
 	_prev_segfault = signal(SIGSEGV, HandleSavegameLoadCrash);
 	_prev_abort    = signal(SIGABRT, HandleSavegameLoadCrash);
+	_prev_fpe      = signal(SIGFPE,  HandleSavegameLoadCrash);
 }
 
 /**
@@ -259,6 +261,7 @@ static void ResetSignalHandlers()
 {
 	signal(SIGSEGV, _prev_segfault);
 	signal(SIGABRT, _prev_abort);
+	signal(SIGFPE,  _prev_fpe);
 }
 
 /**
@@ -301,7 +304,13 @@ static void CDECL HandleSavegameLoadCrash(int signum)
 
 	ShowInfo(buffer);
 
-	SignalHandlerPointer call = signum == SIGSEGV ? _prev_segfault : _prev_abort;
+	SignalHandlerPointer call = NULL;
+	switch (signum) {
+		case SIGSEGV: call = _prev_segfault; break;
+		case SIGABRT: call = _prev_abort; break;
+		case SIGFPE:  call = _prev_fpe; break;
+		default: NOT_REACHED();
+	}
 	if (call != NULL) call(signum);
 }
 

src/train_cmd.cpp

@@ -2387,7 +2387,7 @@ static bool CheckTrainStayInDepot(Vehicle *v)
 	}
 
 	/* We are leaving a depot, but have to go to the exact same one; re-enter */
-	if (v->tile == v->dest_tile) {
+	if (v->current_order.IsType(OT_GOTO_DEPOT) && v->tile == v->dest_tile) {
 		/* We need to have a reservation for this to work. */
 		if (GetDepotWaypointReservation(v->tile)) return true;
 		SetDepotWaypointReservation(v->tile, true);